<img src="https://tex.z-dn.net/?f=x%20%20%5C%3A%20%20%5C%3A%20is%20%5C%3A%20half%20%5C%3A%20of%20%5C%3A%20y" id="TexFormula1" ti

sergeinik [125]

3 years ago

tle="x \: \: is \: half \: of \: y" alt="x \: \: is \: half \: of \: y" align="absmiddle" class="latex-formula">

Mathematics

2 answers:

777dan777 [17]3 years ago

8 0

Answer:

2x=y

Step-by-step explanation:

Since x is half of y, 2x=y

Hope this helps :D

icang [17]3 years ago

5 0

Answer:

$\huge \boxed{x = \frac{y}{2} }$

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A 7.0 kg textbook is placed in a shelf 1.5 m high. What is the potential energy relative to the floor?

jeyben [28]

Answer:

PE = 102.9 Joules

Step-by-step explanation:

PE = mgh

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= 102.9 Joules

4 0

3 years ago

A pole that is 3m tall casts a shadow that is 1.22m long. At the same time, a nearby building casts a shadow that is 38.5m long.

vichka [17]

Refer to the diagram shown below.

The height of the pole is CD (3 m), and its shadow is AB (1.22 m).
The height of the building is h m, and its shadow is AD (38.5 m).

The two triangles ΔABC and ΔADE are similar because of AAA.
Therefore
$\frac{DE}{BC} = \frac{AD}{AB} \\\\ \frac{h}{3} = \frac{38.5}{1.22}$

Cross multiply.
1.22 h = 3*38.5 = 115.5
h = 115.5/1.22 = 140.91 m

Answer: 141 m (nearest meter)